Renames the `app/pages` module to `app/views` to better reflect the
purpose of the directory, aligning with conventional MVC naming
conventions where view-related logic is housed under `views`.
Reorganize Palladium codebase into a modular architecture with `core/`
shared logic and `app/` Streamlit UI, separating per-study assets into
`studies/YYYYMM_<Vendor>/` folders containing notebooks, seed data, and
configuration. Update README to reflect new structure, add `.gitignore`
entries for `.env` and study exports, and refresh component documentation.
